Friction feed mechanism.



M. FLATHER. PRIOTIDN FEED MEOHANISM.

` APPLIGATION FILED MAY 6, 1904.

950,480, Patented Mar. l, 1910.

3 Y Y n C A 6 um 3 y /A4 55.2 O A6 E. A3 l/l//TA/ESSES l fw E /A/l/E/vTo@ MARK FLATHER, OF NASHUA, NEW HAMPSHIRE.

FRICTION FEED MECHANISM.

VSpecification of Letters Patent.

Application filed May 6, 1904.

Patented Mar. 1, 1910. Serial No. 206,769.

To all whom it may concern:

Be it known that I, MARK Ilnvrnnn, a citizen of the United States,residing at Nashua, county of Hillsboro, and State of New Hampshire,have invented certain new and useful Improvements in Friction FeedMechanism, of which the following is a specication, reference being hadto the accompanying drawings.

The object of my device is to provide in a friction feed mechanism meanswhereby pressure on the contacting surfaces of the friction device maybc relieved or removed automatically when the desired throw of thefeeding device has been completed.

Another object of my invention is to so construct and arrange my feeddevice that it may be applied to various iron and wood working tools inwhich either the work or the cutting tool has a reciprocating motion,such as metal planers and shaping machines.

In the drawings accompanying this specification-Figure l represents aside elevation of a portion of a shaping machine having my friction feeddevice attached thereto. Fig. 2 is a plan view of a portion of a sectionof the shaping machine to which my improved. friction feed mechanism isattached. Fig. 3 is a sectional elevation through line 3-3, Fig. l. Fig.4 is a perspective sectional view of a portion of the frictionmechanism, and the means for relieving the pressure between thefrictional surfaces thereof.

In the drawings, A represents the reciprocating member of my frictionfeed device; it is mounted upon the stud B secured in the ram C of aShaper. Surrounding the stud B is the collars B and B5, which serve as abearing for the reciprocating member A. The collar B is screw-threadedin the inner end of the oscillating member A, and may be screwed in orout to adjust. the friction on the surfaces of the friction members A2and D, and the collar B2 is a revolving fit therein. Surrounding thestud B is a spiral spring B5, its inner end bearing against the collarB, while its outer end has a bearing against the collar B2, the purposeof the spiral spring being to press said reciprocating member A inwardlyagainst the rotary friction member D, so that the surfaces A2 and D willcome into frictional Contact in order to oscillate said reciprocatingmember A.

The rotary friction member D is adapted to rotate about the stud B andhas on its periphery the gear teeth E, which enmesh with the rack Fattached to the gib F. It will be understood that the ram C is adaptedto slide back and forth longitudinally by any suitable means. then saidram C slides backward and forward it causes the friction member D torotate by reason of the gear teeth thereon enmeshing with thestatiollary rack F.

A5, A5 are cam surfaces attached to the reciprocating member A, and C',C', .1', C are cam surfaces formed upon the plate C2 which is attachedto the projection C3 of the ram C in such manner that said cams C', C',C', C are in the track of the cam projections A, A5, and adapted tocontact with same to throw the reciprocating member A outwardly andrelieve the tapering frictional surfaces A2 and D from frictionalcontact. The relieving or throwing of the tapering frictional surfaces Dout of frictional contact allows the rotating member D to rotate freelyabout the stud B without moving the oscillating member A.

In the embodiment of my invention as attached to a shaping machine, themember A has the portion A attached tio its outer end, which is providedwith the slot At adapted to receive the stud A5. Said stud A5 haspivoted to it one end of the connection rod C5, the other end of saidconnection rod C* being attached to any suitable device for .feeding thetool-head of the shaping machine, the movement of the pitman rod C beinggrt-rater or less, according as the connection A5 is moved out or infrom the center of the reciprocating member A. lVhen the feeding deviceis adjusted to the proper throw, it is held in position by means of thescrew-threaded clamping nut A5.

The operation of my improved device is as follows:-

The desired amount of feed of the cutting tool being determined, the endof the connection rod C'l which is secured to the reciprocating member.A is moved up or down in the slot A4 to give it the right amount ofmovement. The shaper being started up so that the ram C slides back andforth, the portion A will revolve through the medium of the gear teethon the portion D enmeshing with the rack F, and will continue to revolveuntil the cam projections A5, A5 strike either of the cams C', C', C, C;thereupon said cam surfaces will ride upon each other and throw thefrictional surfaces A2 and D out of contact, Whereupon said portion Awill remain stationary until the ram C has completed its stroke andstarted on the return movement.

Having described my invention, What I claim is The combination in afriction feed mechanism for planers of a reciprocating ram having a studsecured therein; a revoluble tapering friction member on said stud; gearteeth on said friction member; a stationary rack. secured to the frameof the planing machine arranged to enmesh with the teeth of said gear; areciprocable friction member mountedon said stud and arranged to engagethe revoluble friction member; a spring for causing the engagement ofsaid friction members; an adjustable collar for adjusting the tension ofsaid spring; oppositely disposed cam members on the reciprocatingfriction member; oppositely disposed stationary cam members arranged forengaging the cam members on the friction member; and adjustable meanssecured to said reciprocating friction member to connect it With thefeed mechanism of a planer, substantially as shown and described.

In testimony whereof, I have hereunto set my hand, in the presence oftwo subscribing Witnesses, this the 30th day of April, A. D.

MARK FLATHER. Witnesses J. E. TOLLES, C. A. WOODBURY.

